Nature and Properties of Materials - - Unit 10 -... https://onlinecourses.nptel.ac.in/noc18_mm10/u... X [email protected] ▼ Courses » Nature and Properties of Materials Announcements Course Ask a Question Progress Mentor FAQ Unit 10 - Week 8 - Non-mechanical properties & Laboratory demonstration Course outline Assignment 8 The due date for submitting this assignment has passed. How to Access As per our records you have not submitted this Due on 2018-10-03, 23:59 IST. the Portal ? assignment. Week 0 - 1) Which one of the following properties do not belong to diamagnetic materials? 1 point Assignment Zero (Self- No magnetic dipoles in the absence of a magnetic field assessment) Magnetic susceptibility is positive Week 1 - Dipole moments are aligned opposite to external field direction Introduction: Materials & their Magnetism arises only when an external field is applied Mechanical properties No, the answer is incorrect. Score: 0 Week 2 - Atomic Accepted Answers: bonding & the role of Crystal Magnetic susceptibility is positive structure 2) Permanent magnets are usually made up of 1 point Week 3 - Metals & Ceramics Nickel Aluminium alloy Alnico alloy Week 4 - Polymers Wrought iron Grey cast iron Week 5 - Composites No, the answer is incorrect. Score: 0 Week 6 - Smart Materials Accepted Answers: Alnico alloy Week 7 - Material 3) For transmitting the electrical energy over a long distance, the general preferred material is 1 point Selection in Engineering design (Ashby Copper approach) © 2014 NPTEL - Privacy & Terms - Honor Code - FAQs - A project of In association with Funded by 1 of 3 Wednesday 17 October 2018 12:40 AM Nature and Properties of Materials - - Unit 10 -... https://onlinecourses.nptel.ac.in/noc18_mm10/u... Optical Accepted Answers:Powered by Properties Steel-reinforced aluminium Optical Fiber 4) A material has refractive index of 2.5. If the light is falling normal from a glass sheet of 1 point Thermal refractive index 1.5, what will be the approximate reflectivity of the material? Properties 0.512 Numerical: Material 0.0625 selection for Heat exchanger 0.256 Electric 0.0456 Properties-I No, the answer is incorrect. Electric Score: 0 Properties-II Accepted Answers: Magnetic 0.0625 Properties 5) In order to increase the electrical conductivity of a metal, the preferred method is 1 point Laboratory demonstration Increase the vibration level Quiz : Assignment 8 Decrease the temperature WEEK 8- Increase the temperature FEEDBACK - Decrease the vibration level Nature and Properties of No, the answer is incorrect. Materials Score: 0 Solution Accepted Answers: Assignment 8 Decrease the temperature 6) Piezoelectric materials are used for generating 1 point Microwaves Ultrasonic waves Musical waves Love waves No, the answer is incorrect. Score: 0 Accepted Answers: Ultrasonic waves 7) Find the effect which is not related to the light absorption mechanism 1 point Tyndall Effect Compton Scattering Effect Photoelectric Effect Peltier Effect No, the answer is incorrect. Score: 0 Accepted Answers: Peltier Effect 8) Light travels from air into an optical fiber with an index of refraction of 1.44. Then, in which 1 point direction does the light bend? If the angle of incidence on the fiber is 22 degree, what is the angle of refraction inside the fiber? Bends towards the normal and 15 degree 2 of 3 Wednesday 17 October 2018 12:40 AM Nature and Properties of Materials - - Unit 10 -... https://onlinecourses.nptel.ac.in/noc18_mm10/u... Bends towards the normal and 25 degree Bends away from the normal and 15 degree Bends away from the normal and 25 degree No, the answer is incorrect. Score: 0 Accepted Answers: Bends towards the normal and 15 degree 9) Which of the following accounts for the major signal loss inside an optical fiber? 1 point Radiative loss Scattering loss Absorption loss Micro-bending No, the answer is incorrect. Score: 0 Accepted Answers: Scattering loss 10)The highest value of thermal conductivity is expected for 1 point Steam Solid ice Melting ice Water No, the answer is incorrect. Score: 0 Accepted Answers: Solid ice Previous Page End 3 of 3 Wednesday 17 October 2018 12:40 AM.